New gadget .

[Rmckoy]

Picked up a Hannah salinity meter . This thing is pretty cool !

 

[Hydrored]

Love them, I have an addiction to them. 4 total somewhere in the house lol

 

[Rmckoy]

As easy as they are to use .

I can assume they’re already calibrated ?
How often do you calibrate them ?

good to know my old refractometer was close .....
calibrated with RODI water . It was 1.025 with the refractometer . And 1.026 with the new gadget

 

[Hydrored]

I calibrated mine out of the package because I’m wired like that, I recalibrate once a month

 

[Rmckoy]

I w

I calibrated mine out of the package because I’m wired like that, I recalibrate once a month


I was thinking I should but assumed it should already be calibrated .

 

[Val Shebeko]

Accurate or kinda ?

 

[Hydrored]

It matched the recent ICP test I had done

 

[Rmckoy]

It matched the recent ICP test I had done

Icp ?

 

[Randy Holmes-Farley]

You can make (or buy) a calibration fluid to check it:

Reef Aquarium Salinity: Homemade Calibration Standards by Randy Holmes-Farley - Reefkeeping.com

http://reefkeeping.com/issues/2004-06/rhf/index.htm

This makes a 53 mS/cm standard (35 ppt):

To make a 3.29 weight percent sodium chloride solution, dissolve 1 teaspoon (6.20 grams) of Morton's Iodized Salt in 182 mL (182 g) of fresh water (making a total volume of about 184 mL after dissolution of the salt). This solution can be scaled up as desired.

For a rougher measurement in the absence of an accurate water volume measurement:

1. Measure ¼ cup of Morton's Iodized Salt (about 73.1 g)
2. Measure the full volume of a plastic 2-L Coke or Diet Coke bottle filled with purified fresh water (about 2104.4 g)
4. Add 3 tablespoons of purified fresh water (about 45 g)
5. Dissolve the total salt (73.1 g) in the total water volume (2149.4 g) to make an approximately 3.29 weight percent solution of NaCl. The volume of this solution is larger than the Coke bottle, so dissolve it in another container.

How to Use a Conductivity Standard

How to best use a conductivity standard depends a bit on the meter involved. If the meter can be calibrated, then my suggestion is to get the solution to about 25ºC (exactly that temperature if the meter doesn't automatically compensate for temperature, but that would be unusual) and then adjust the meter until it reads 53 mS/cm or S=35 (depending on the output).

Many meters, however, do not allow such calibration. In that case, measure the conductivity or salinity of the standard, and then set up a correction ratio that is applied manually. For example, if the standard reads 56 mS/cm, then multiply all readings on that meter by 53/56 (0.946) to get a corrected reading. The same correction could apply to salinity. For example, if it reads S=38 (or 38 ppt), then multiply every reading by 35/38 = 0.921.

Alternatively, the simplest way is to use the value that is found from the standard as the target for the aquarium, and not worry about calibrations or corrections.

 

[Randy Holmes-Farley]

And this very old article of mine describes the basis of conductivity meters to measure salinity:

AquariumFish.com :: Aquarium Fish International :: The monthly magazine for both novice and expert aquarium hobbyists.

AQUARIUM FISH MAGAZINE is THE monthly magazine for both novice and expert aquarium hobbyists. Aquarium Fish Magazine provides information on choosing, caring for, and breeding freshwater and marine fish.

web.archive.org

 

[Rybren]

Your Hanna Meter should have come packaged with packets of calibration fluid. Use one of the packages and follow the instructions in the manual to calibrate the meter.

Mine has held the calibration for 4 months so far.

 

[Rmckoy]

Your Hanna Meter should have come packaged with packets of calibration fluid. Use one of the packages and follow the instructions in the manual to calibrate the meter.

Mine has held the calibration for 4 months so far.

Accurate or kinda ?

it came
With 4 .
I haven’t calibrated it yet .

 

[vetteguy53081]

Very easy to use and love the fact that you (as I did) can covert to 1.02X instead of PPT

 

[Perthegallon]

Picked up a Hannah salinity meter . This thing is pretty cool !

DO NOT FLOAT THEM water leaks in them way to easy if you flow them I saw a ig post of it and tried it once water went straight to the display and messed the whole thing up

 

[William Mumford]

Love mine. I dont use my refractometer anymore.

 

[Rmckoy]

DO NOT FLOAT THEM water leaks in them way to easy if you flow them I saw a ig post of it and tried it once water went straight to the display and messed the whole thing up

Why would anyone try floating them ?

Dip , read , rinse and put it back in packaging

 

[Perthegallon]

Why would anyone try floating them ?

Dip , read , rinse and put it back in packaging

Lazy mans way getting a read

 

[Rmckoy]

Lazy mans way getting a read

Dipping in and waiting 3 seconds seams as lazy mans way as it gets .

 

[Randy Holmes-Farley]

Dipping in and waiting 3 seconds seams as lazy mans way as it gets .

lol

 

[Perthegallon]

Dipping in and waiting 3 seconds seams as lazy mans way as it gets .

I wanted to mix salt in and see readings at the same time